Ideals that today’s edu­cat­ed peo­ple take for grant­ed — equal rights, free speech, and the pri­ma­cy of human life over tra­di­tion, trib­al loy­al­ty and intu­itions about puri­ty — are rad­i­cal breaks with the sen­si­bil­i­ties of the past. These too are gifts of a widen­ing appli­ca­tion of rea­son.

Fair enough, but to con­trast what edu­cat­ed peo­ple were like in the bad old days, Prof.…